STOCKTON - Detectives spent hours at a Stockton apartment complex investigating the city's 13th homicide of 2013 after a man was found dead Friday, authorities said.

Police were dispatched to the Venetian Park Apartments in the 1400 block of Marco Polo Drive on a report of a disturbance at 12:13 p.m., officials said. When they arrived, they found a deceased man in an upstairs apartment unit, authorities said. Police did not disclose how the man died.

One resident of the apartment complex said he heard about five gunshots Thursday night. Another said there was drug activity at the apartment unit where the body was found. Both residents spoke on condition of anonymity because they feared for their safety.

The apartment complex is located on Marco Polo Drive near North Pershing Avenue, directly across from the west entrance to San Joaquin Delta College. Residents said there were three people - a woman, her boyfriend and another man - living in the apartment unit where the body was found.

A man was detained in the back of a police car and later driven away from the scene. A woman was taken away from the scene in the front seat of an unmarked police car.